Cornelius meiners



"nied gime 'CORNELIUS MEINERS, OF INDIANAPOLIS, INDIANA.

Letters Patent No. 102,847, dated May 10, 187 0,

IMPROVEMENT IN HEAD-BLOCKS OF SAW-MILLS The Schedule referred to inthese Letters Patent and making part of the same I, CORNELIUS M nrsnns,of Indianapolis, in the oo nnty of Marion and State of Indiana, haveinvented certain Improvements in Head-Blocks for Saw-mills, of which thefollowing is a specification.

Nature and Objects of the Invention.

My invention relates to that class of head-blocks in which screws areemployed to operate the knees, said screws being actuated by means of alongitudinal seti ting-shaft, furnished with ruiter-wheels that gearwith unter-wheels onA the ends of the Screws; and

It consists in the arrangement of a spur-pinion and unter-wheel, to gearwith a ruiter-wheel on the longitudinal setting-shaft, said spur-pinionand miter-wheel being operated by means of a lever, pawl,.ratehet, andspur-wheel in such a manner as to enable the Sawyer, whileistandiugupright, to set the log by one or more movements ot' the lever, insteadof requiring several turns of the crank on the vsetting-shaft, asheretofore, combining therewith the advantages of the great aecuracy ofscrew head-blocks in setting the log to any d esired fraction of aninch.

//- Description of the Accompanying Drawings,

Figure 1 is a side elevation of a saw-mill carriage, having head-blocksembodying my invention..

Figure 2 is a horizontal or plan'view of the saine.

General Description In order to avoid the stooping posture required tovturn the setting-shaft in this manner, and-at the same time to operatethe screws D more rapidly, thus saving both time and labor, I arrange acombined spurW pinion and miter-wheel e, on one of the screws D, insteadof the ruiter-wheel usually employed, to gear with the ruiter-wheel Fonthe setting-shaft, as shown, and operate said spur-pinion andmiter-wheel by means of thelever I, spring pawl, (not shown,) hung toarm i., ratchet J, and spur-wheel H. f v The spur-wheel H, lever I, andratchet J, are, so

` proportioned and arrangedwth reference to each other and thespur-pinion and miter-wheel e ou screw D, that a single stroke of thelever may he made to move the knees as much as one and one-halt` inch,or any desited less distance, the stroke ofthe lever being regu- ,llatedbypius set in the holes in the 'guide K. For greater distances, two ormore strokes of' the lever may be employed.

\Vhen it is desired to run the knees back, the pawl is disengaged fromthe ratchet by meansv of a cam on e the shaft of the thumb-nut L, whenthe screw may be operated by means otl the crank Gr iu' thesettingshaft.

The mode of operating the knees for sawing tapering lumber is t-he sameas in the ordinary screw head block.

The ratchet J may be dispensed with, if desired, and the pawl attachedto a lever in a manner to operate directly upon the teeth of thespur-wheel H. What I claim as my linvention, and desire to securer byLetters Patent,`i's- The combination of knee O, screw D, sind gear e,with gears H and E, lever l, and ratchet J, when ,wall the parts areconstructed as and for the purpose specified. v

CORNELIUS MEINERS.

- Witnesses:

G. A. SKINNER, O. F. MAYHEW.

